Improvement in locking devices for seeding-machine teeth



2 Sheets-Sheet 1.

T. GALLOWAY & J LARSEN. Looking Device for Seeding-Machine Teeth. No.221,675. Patented Nov. 18, 1879.

i T EE F C A Wi'Lmsc/s Q Iflw'cnfto r5:

7 Mmm NPEIERS. PNOTO-LITHOGRAPMER, WASHINGTON. n cy 2 Sheets-Sheet 2, T.GALLOWAY & J. LARSEN.

Locking Device for Seeding-Machine Teeth. No. 221,675. Patented Nov. 18,1879..

NPETERS. FHOTO-LITHOGRAPHER, WASHlNGTON. D C

? UNIT STATES PATENT OFFIoE.

THOMAS GALLOWAY AND JOHN LARSEN, OF OSHAWA, ONTARIO, CANADA.

IMPROVEMENT IN LOCKING DEVICES FOR SEEDING-MACHINE TEETH.

Specification forming part of Letters Patent No. 22!,675, dated November18, 1879; application filed June 30, 1879.

To all whom it may concern.-

Be it known that we, THOMAS GALLOWAY and JOHN LARSEN, both of Oshawa, inthe county of Ontario, in the Province of Ontario,

Canada, have jointly invented certain new and useful Improvements inLocking Devices for the Teeth of Seeding-Machines, of which thefollowing is a specification.

Our invention has relation to an improved construction of spring-lockingdevice for the teeth of seeding and cultivating machines, by whichsimplicity, cheapness, and strength of construction, combinedwithadjustableness of parts, are obtained.

In the accompanying drawings, Figures 1 and 2 are side views, indifferent positions, of ourlockin g device, shown as appliedto abroadcast seeding-tooth. Fig.3is a plan of the same. Figs.4, 5, and Garedetailsin perspective. Fig. 7 is a side view, showing locking deviceapplied to a drilling-tooth.

A is the tooth, andflB B the drag-bars, constructed substantially in theusual way. 0 O are the tooth-retaining links connected with the toothand locking-stud E. F is the spring, G, an adjusting-wedge for thelocking-stud, and-Haneccentric-block, by meansof which the tension ofthe springcan be increased or diminished. v

The locking-stud E is constructed of malleable cast-iron, and .at itspivotal point is provided with trunnions E E, which fit into holes outat the proper point in the drag-bars. At

, the point of its connection with the spring the locking-stud isprovided with two lugs, E E through acored hole in which a bolt, 0, ispassed, andbetween which, on said bolt, the forward end of the spring Fis secured. The lugs E E of the locking-stud correspond in thicknesswith and are placed vertically above the drag bars, and their underfaces are squared to form a bearin g for the stud on the drag-bars. Thebearing thus formed for the stud holds the locking parts in properadjustment; but in order that adjustment maybe obtained to vary thestrength of the look a wedge, G, is provided. This wedge is slotted atits forward end to allow clearance for the spring, and is insertedbetween the bearing-faces of the stud and dragbars to any degreerequired for adjustment. It is secured in position by a T-hcaded bolt,G, which passes between the drag-bars.

The locking-stud is provided with laterallyprojecting ears E E", whichform a pivotal connection for the front ends of the retainin g-lin ks OC. These ears are made longer than the thickness of the links 0 O, inorder that the head and nut of the bolt 0, when the whole combination isfastened together, may not bind on the links, but tighten against thefaces of the ears, thus avoiding unnecessary friction.

The spring F is constructed of plate-steel, carefully tempered and bentto templet. It is secured between the drag-bars, at one end, by a stud,b. From the stud b it is carried above the drag-bars; thence, with ashort turn, down and between the bars; thence forwardly and upwardly, inan easy curve, to connect w1th the bolt on the end of the locking-stud.At the point where the spring passes above the drag-bars anadjusting-block, H,is introduced. This block is provided at each endwith four faces, which correspond with the position of the drag-bars,and which vary in degree of eccentricity with the central cylindricalportion, h. The object of this eccentric-block is to allow of theadjustment of the tension of the spring, which is accomplished byturningthe block until the face having the proper degree of cocentricity bearsupon the edges of the drag-bars.

The teeth, in practice, are frequently thrown back with such violencethat the bars 0 G are bent out of position, and the usefulness of thelocking device thus destroyed. To obviate this defect, we provide thelocking-stud with a stopblock, E, which, when the stud is drawn back,strikes against the face of spring, as shown in Fig. 2, limiting thedistance to which the tooth can rise, and thus prevent the bars 0 frombeing injured.

The advantages gained by ourimprovements are, first, by means of the adjusting-wedge the strength of the lock can be regulated to a nicety tosuit the varying requirements of different lands, and to correct anyerrors caused by irregular drilling of the holes for the P V- otalpointsofthe locking-stud; second,bymeans of the ears on thelocking-studs extending beyond the thickness of the tooth-retainingbars, said bars can be securely fastened without binding, and, further,the bolt which secures the retaining-bars also forms the medium by whichthe spring is connected to the locking studs; third, the durability,simplicity, and convenience of the spring, and the means provided foradjustment.

We claim as new and desire to secure by Letters Patent- 1. Thelocking-stud E, provided with the trunuions E E, lugs E E ears E E andstriking-block E, all combined in a single piece of metal, as and forthe purpose specifled.

2. The slotted adjusting-wedge G and bolt G, in combination withthedrag-bars and locking-stud, substantially as shown and described.

3. The locking-stud E, provided with the ears E E in combination withthe retaininglinks 0 O and the bolt 0, said ears being made hollow andprojecting beyond the outside faces of the retaining-links,substantially as and for the purpose specified.

I 4. The combination of the locking-stud E,

provided with the hollow projecting earsE E drag-bars, and the curvedspring F, substantially as and for the purpose set forth.

5. The curved plate-spring F, connected at one end between thedrag-bars, thence curving upwardly over an adjusting-block, thence curvin g downwardly and forwardly, and thence upwardly to connect with thelocking-stud E, substantially in the manner shown, and for the purposeset forth.

6. The adjusting-block H, provided with the cylindrical body h and theeccentrically-faced ends, in combination with the drag-bars and thespring F, as and for the purpose set forth.

7. The combination and arrangement of the locking stud and attachments,adjustingwedge G, drag-bars B B, tooth-retaining links (J (J, and thespring F, arranged and operating substantially as shown and described.

THOMAS GALLOWAY. JOHN LARSEN.

In presence of- A. R. GUNoW, FRAS. GILBERT.

